Most SE sites will have a general purpose chat room as a sort-of catch-all; a way to:
- ping a moderator
- ask for advice about the topicality of an issue before posting it or writing an explanation in a meta question)
- leave notice of and/or discuss a question on a different site that could benefit from some GIS expertise or be of specific interest, such as Why doesn't Wolfram Alpha show low gravitational acceleration for the Hudson Bay?
But this site doesn't have one of these.
Might it be a good idea for one to exist?